diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index c936479fbfb2..e6064d2f9e00 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,7 +1,7 @@
 2017-08-04  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR c++/79790
-	* g++.dg/cpp1z/class-deduction42.C: New.
+	* g++.dg/cpp1z/class-deduction43.C: New.
 
 2017-08-04  Yury Gribov  <tetra2005@gmail.com>
 
diff --git a/gcc/testsuite/g++.dg/cpp1z/class-deduction43.C b/gcc/testsuite/g++.dg/cpp1z/class-deduction43.C
new file mode 100644
index 000000000000..a906a0f36264
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp1z/class-deduction43.C
@@ -0,0 +1,10 @@
+// PR c++/79790
+// { dg-options -std=c++1z }
+
+template <int N>
+struct array
+{
+  int a [N];
+};
+
+array a = { 1, 2, 3 };  // { dg-error "cannot deduce" }